High stable non-ionic n-vinyl butyrolactam iodine and preparation method thereof

Abstract

The present invention relates to a preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine, wherein non-ionic N-vinyl butyrolactam, iodine and at least one grinding aid are stirred at 150-800 r/min at a temperature of 50° C.-90° C. for 1 to 12 hours to prepare the high-stable non-ionic N-vinyl butyrolactam iodine, wherein the K value of the non-ionic N-vinyl butyrolactam is 32±1, the PD value of the main peak of the non-ionic N-vinyl butyrolactam is ≦1.6, the moisture content of the non-ionic N-vinyl butyrolactam is ≦2.5%, preferably, the grinding aid is selected one or several from sodium chloride, sodium citrate, sodium carbonate and sodium phosphate, the amount of the grinding aid added is 0.02 to 2% of the total amount of the non-ionic N-vinyl butyrolactam and the iodine, the non-ionic N-vinyl butyrolactam is PVP-K32, the high-stable non-ionic N-vinyl butyrolactam iodine prepared by the above mentioned method is also provided, the stability of the high-stable non-ionic N-vinyl butyrolactam iodine of the present invention is high, thereby facilitating long-term storage and use, thus the high-stable non-ionic N-vinyl butyrolactam iodine is suitable for large-scale popularization.

1 . A preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine, characterized in that, non-ionic N-vinyl butyrolactam, iodine and at least one grinding aid are stirred at 150-800 r/min at a temperature of 50° C.-90° C. for 1 to 12 hours to prepare the high-stable non-ionic N-vinyl butyrolactam iodine, wherein the K value of the non-ionic N-vinyl butyrolactam is 32±1, the PD value of the main peak of the non-ionic N-vinyl butyrolactam is ≦1.6, the moisture content of the non-ionic N-vinyl butyrolactam is ≦2.5%. 
     
     
         2 . The preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine according to  claim 1 , characterized in that, the grinding aid is selected one or several from sodium chloride, sodium citrate, sodium carbonate and sodium phosphate. 
     
     
         3 . The preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine according to  claim 1 , characterized in that, the amount of the grinding aid added is 0.02 to 2% of the total amount of the non-ionic N-vinyl butyrolactam and the iodine. 
     
     
         4 . The preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine according to  claim 3 , characterized in that, the non-ionic N-vinyl butyrolactam is 42 g, the iodine is 8 g and the grinding aid is 0.01-1.0 g. 
     
     
         5 . The preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine according to  claim 1 , characterized in that, the temperature is provided in an oil bath manner. 
     
     
         6 . The preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine according to  claim 1 , characterized in that, the non-ionic N-vinyl butyrolactam is obtained by reacting N-vinyl butyrolactam (NVP), an initiator, and water at 55-80° C. in an inert gas for 0.5 to 8 hours and then drying the product. 
     
     
         7 . The preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine according to  claim 6 , characterized in that, the inert gas is nitrogen. 
     
     
         8 . The preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine according to  claim 1 , characterized in that, the non-ionic N-vinyl butyrolactam is PVP-K32. 
     
     
         9 . A high-stable non-ionic N-vinyl butyrolactam iodine, characterized in that, the high-stable non-ionic N-vinyl butyrolactam iodine is obtained by the preparation method of a high-stable non-ionic N-vinyl butyrolactam iodine according to  claim 1 .